[TROPICAL JAM] OK, so Portland isn't exactly in the tropics, but you can take a sonic vacation at the first annual Summer Island Jam Series, presented by KZME and Portland-based world-music label Rose City Voodoo. This is the first of three gigs this summer reveling in Caribbean beats, and be warned: Even the most dubious Northwest hipster may succumb to happy feet. Saturday's lineup features steel drum aficionado Northwest Panman, neo-soul hip-hoppers Bel Mizik ("beautiful music" in Haitian French Creole), Hawaiian jam-rockers Sons of the Late DC, and Snackmaster DJ. The genre-jumping lineup unites under salt-soaked island vibes reined in by master of ceremonies Madgesdiq, Portland's own Rastamerican poet.